I have the following code: 


#!/tool/bin/perl -w
use lib '/home/user_foo/perl_modules/lib/perl5';
use List::MoreUtils qw(uniq);

my @test_array = qw(1 2 3 4 4 4 4);

my @uniq_test_array = uniq(@test_array);

printf("\@uniq_test_array = @uniq_test_array\n");

[download]

The output is as follows (as expected):


@uniq_test_array = 1 2 3 4

[download]

Now if I add another module reference (File::Copy) to the top of the file like so: 


#!/tool/bin/perl -w
use lib '/home/user_foo/perl_modules/lib/perl5';
use List::MoreUtils qw(uniq);
use File::Copy;

[download]

I receive the following error message:


/tool/bin/perl: symbol lookup error: /home/user_foo/perl_modules/lib/p
+erl5/x86_64-linux/auto/List/Util/Util.so: undefined symbol: Perl_gv_i
+nit

[download]

The error references the List::Util module, but doesn't occur unless I add the "use File::Copy", which is a completely separate module. What is going on here?

In reply to help with "symbol lookup error" message by Special_K

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.